/Engine/Source/Runtime/Core/Public/Containers/Map.h
Remove the pair with the specified key and copies the value that was removed to the ref parameter
whether or not the key was found
bool RemoveAndCopyValue ( [KeyInitType](API\Runtime\Core\Containers\TMap\KeyInitType) Key, [ValueType](API\Runtime\Core\Containers\TMap\ValueType) & OutRemovedValue )